Remove Cinder v1 tests

Cinder v1 API has been deprecated since Juno, so we don't need to
keep the corresponding tests anymore to remove it on Cinder side.

Ref: https://wiki.openstack.org/wiki/ReleaseNotes/Juno#OpenStack_Block_Storage_.28Cinder.29

Change-Id: I04de2d90fe11f8ec4acbfa983bc0ad3aa979f45b
32 files changed